| 摘要: |
| 铝合金由于易被腐蚀的缺陷限制了其发展,研究表明表面超疏水化能有效地提升其耐腐蚀性能。 文中以铝合金作为基底材料,首先采用激光加工的方法制备微结构表面,然后采用氢氧化钠刻蚀制备超疏水表面。 利用扫描电子显微镜(SEM)、光学轮廓仪、X 射线能谱仪(EDS)、接触角测量仪和电化学工作站对样品表面微观形貌、化学元素组成、 润湿性能和耐腐蚀性能进行表征。 结果表明:激光功率为 30 W,氢氧化钠浓度为 0. 1 M,刻蚀时间为 6 min,该表面的接触角最高为 155. 1°,同时该超疏水表面具有双尺度分层结构,分别是光栅结构与更小一级的蜂窝状结构。 超疏水表面电化学测试表明,腐蚀电位发生左移,为-0. 635 V,自腐蚀电流密度变化更为明显,减小至 1. 68×10-6 mA·cm-2 。 该表面耐腐蚀性能显著增加。 |
| 关键词: 复合制备 超疏水 微结构 激光 耐腐蚀性能 |
| DOI：10.11933/j.issn.1007-9289.20200312001 |
| 分类号:TG174 |
| 文章编号:1007-9289(2020)03-0078-10 |
| 文献标识码:A |
| 基金项目:国家自然科学基金(11872026)；国家重点研发计划(2020YFC2004404)；江苏省高校自然科学基金(18KJA460003)； 江苏省 高校自然科学研究项目(19KJB130005) |
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| Composite Preparation and Properties of Superhydrophobic Aluminum Alloy Surface |
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Yang Xiaohong1, Ye Xia2, Xu Wei2, Gu Jiang2, Fan Zhenmin2, Lu Lei2
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1.College of Materials, Jiangsu University of Technology, Changzhou 213000 , China;2.College of Mechanical Engineering, Jiangsu University of Technology, Changzhou 213000 , China
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| Abstract: |
| Aluminum alloys are easily corroded,which limits their development, researches have shown that superhydropho- bicization of the surface can effectively improve the corrosion resistance. In this paper, prepared the microstructure on the alu- minum alloy by laser processing, and then the superhydrophobic surface was prepared by sodium hydroxide etching. The mi- cromorphology was characterized by the scanning electron microscope and Optical profiler. The chemical composition was char- acterized by X-ray energy spectrometer. The wettability was tested by contact angle meter, and the corrosion resistance was measured by electrochemical workstation. The results show that the contact angle of the surface is up to 155. 1° when the laser power is 30 W, the sodium hydroxide concentration is 0. 1 M, the etching time is 6min and the prepared microstructure has a two-scale layered structure which is a grating structure and a smaller honeycomb structure. The electrochemical test of the pre- pared superhydrophobic surface showed that the corrosion potential shifted to the left, which was -0. 635 V and the self-corro- sion current density changed more obviously, decreasing to 1. 68×10-6 mA×cm-2 . The surface corrosion resistance is signifi- cantly increased. |
| Key words: composite preparation superhydrophobic microstructure laser corrosion resistance |
